कौन सा विकल्प (\(\sqrt{14}+\sqrt{6}\)\(\sqrt{14}-\sqrt{6}\)+\sqrt{84}) के बराबर है?
Which option is equal to (\(\sqrt{14}+\sqrt{6}\)\(\sqrt{14}-\sqrt{6}\)+\sqrt{84})?
Explanation opens after your attempt
A. \(8+2\sqrt{21}\)
Concept
The first product is (14-6=8), and \(\sqrt{84}=2\sqrt{21}\). In exams use both conjugate multiplication and radical simplification.
Why this answer is correct
The correct answer is A. \(8+2\sqrt{21}\). The first product is (14-6=8), and \(\sqrt{84}=2\sqrt{21}\). In exams use both conjugate multiplication and radical simplification.
Exam Tip
पहला गुणनफल (14-6=8) है और \(\sqrt{84}=2\sqrt{21}\) है। परीक्षा में संयुग्मी गुणन और मूल सरलीकरण दोनों करें।
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